Have fun in Mexico!  My roommate studied there 
last summer, and she loved it.  Just remember 
that the water there is very sketch, so be sure 
to bring the "anti-sketch" medicine (as she calls 
it).

But even though I'm in pharmacy school, I can't 
recommend any medicinal therapy for cel 
withdrawal.  (I suppose if I could find it, my 
bank account wouldn't suffer so much.)  Sorry!  
^^;

~Anne, who wishes she could go study abroad...